The ESPO was a short-barreled rifle with an open-frame stock. Its strength was not in accuracy—indeed, it did not have much of that—but rather in its ability to hit anything within a general field of fire. Critics of the CSA have said that the rifle matched the CSA philosophy perfectly—when in doubt, shoot into a crowd, or so the cynics say.
Espos were known to use this weapon on constant-fire mode the majority of the time, as they could afford to waste power hosing it around without regard for collateral damage or innocent bystanders.